![Edwin Hubble looking through the 100-inch Hooker telescope at Mount Wilson in Southern California, 1929 discovers the Universe is Expanding. Credit: Margaret Bourke-White/Time & Life Pictures/Getty Images. | sciencesprings Edwin Hubble looking through the 100-inch Hooker telescope at Mount Wilson in Southern California, 1929 discovers the Universe is Expanding. Credit: Margaret Bourke-White/Time & Life Pictures/Getty Images. | sciencesprings](https://sciencesprings.files.wordpress.com/2019/02/edwin-hubble-looking-through-a-100-inch-hooker-telescope-at-mount-wilson-in-southern-california.jpg?w=624)
Edwin Hubble looking through the 100-inch Hooker telescope at Mount Wilson in Southern California, 1929 discovers the Universe is Expanding. Credit: Margaret Bourke-White/Time & Life Pictures/Getty Images. | sciencesprings
At Mt. Wilson, scientists celebrate 100th birthday of the telescope that revealed the universe - Los Angeles Times
![Mount Wilson Observatory on Twitter: "This is what the 100" primary mirror sees when the mirror shutter opens. A rare view of the Hooker telescope's interior, secondary, and tertiary mirrors courtesy of Mount Wilson Observatory on Twitter: "This is what the 100" primary mirror sees when the mirror shutter opens. A rare view of the Hooker telescope's interior, secondary, and tertiary mirrors courtesy of](https://pbs.twimg.com/media/EyAoW30VEAE4cq_.jpg)
Mount Wilson Observatory on Twitter: "This is what the 100" primary mirror sees when the mirror shutter opens. A rare view of the Hooker telescope's interior, secondary, and tertiary mirrors courtesy of
![Edwin Hubble at the controls of the 100-inch Hooker Telescope at Mount Wilson (~1922). Here he was to discover that the Universe was not entirely contained within the Milky Way (as was Edwin Hubble at the controls of the 100-inch Hooker Telescope at Mount Wilson (~1922). Here he was to discover that the Universe was not entirely contained within the Milky Way (as was](https://i.redd.it/3anontfg43241.jpg)
Edwin Hubble at the controls of the 100-inch Hooker Telescope at Mount Wilson (~1922). Here he was to discover that the Universe was not entirely contained within the Milky Way (as was
![Hooker 100-inch reflecting telescope, Mount Wilson Observatory. - Photographs - Huntington Digital Library Hooker 100-inch reflecting telescope, Mount Wilson Observatory. - Photographs - Huntington Digital Library](https://hdl.huntington.org/digital/api/singleitem/image/p15150coll2/888/default.jpg)
Hooker 100-inch reflecting telescope, Mount Wilson Observatory. - Photographs - Huntington Digital Library
![Introduction - Mount Wilson Observatory: Topics in Chronicling America - Research Guides at Library of Congress Introduction - Mount Wilson Observatory: Topics in Chronicling America - Research Guides at Library of Congress](https://www.loc.gov/rr/news/libimages/mount-wilson-observatory.jpg)